Hydroplane



, A. C. ZIEBELL.

HYDROPLANE. APPLICAT'IOR msu APR. 2. 1920.

Patented Jan. 4, 1921.

2 SHEETSSHEET IL INVENTOR. flr/hur C Ziebel/ v A TTOR NE YJ.

UNITED STATES ARTHUR C. ZIEBELL, 0F OSHKOSH, WISCONSIN.

HYDROPLANE.

Specification of Letters Patent.

Patented Jan. 4, 1921.

Application filed April 2, 1920. Serial No. 370,770.

T 0 all whom it may concern Be it known that I, ARTHUR C. ZInBnLL, acitizen of the United States, residing at Oshkosh, in the county oflVinnebago and State of \Visconsin, have invented new and usefulImprovements in Hydroplanes, of which the following is a specification.

This invention relates to high speed boats known as hydro-planes, andits object is to provide the hull of the same with rollers to reduce toa minimum the friction with the water, and thus increase the speed ofthe boat by the diminished resistance to its progress through the water.

The object stated is attained by means of a novel combination andarrangement of anti-friction rollers to be hereinafter described indetail and claimed, and in order that the invention may be betterunderstood, reference is had to the accompanying drawings forming a partof this specification.

In the drawings,

Figure 1 is a plan View of the boat; Fig. 2 is a central longitudinalsection thereof; Fig. 3 is an enlarged cross-section on the line 3-3 ofFig. 2; Fig. 4 is a crosssection on the line 4 l of Fig. 3, and 5 is anenlarged detail view of a roller support.

Referring specifically to the drawings, the hull 10 of the boat has itsbottom stepped, as shown at 11, dividing the same into fore and aftportions 12 and 13, respectively. The propeller shaft 1% emerges fromthe hull bottom at the stepll. The drawings, illustrate in aconventional manner the power plant of the boat, the steering gear andother necessary parts, and as these are immaterial to the invention theyneed not be described.

Immediately back of the step 11, the hull 10 is provided with a pair ofanti-friction rollers 15 set transversely and projecting slightly fromthe hull bottom, as shown in Figs. 2 and 5. A single anti-frictionroller 16 is also positioned astern of the hull, its shaft 17 beingsupported by hearing bracket arms 18 secured to the hull sides andextending rearwardly.

The fore rollers 15 are partly incased in a housing 19 built into thehull 10 and closed at the top and sides to prevent the entry of waterinto the hull, the housing however being open at the bottom to allow therollers to protrude.

Each roller 15 is hollow and airtight, and runs freely on a shaft 20projecting from its ends. To the projecting ends of the shaft areconnected hangers 21 having screw threaded stems 22 which pass throughthe top of the housing 19 as shown in Fig. 3. By means of these hangers,the rollers may be adjusted vertically, and they are held in adjustedposition by nuts 23 screwed on the upper ends of the stems 22.Lubricators 24: are provided for the roller shafts 20.

The boat, when in motion, runs on the rollers 15 and 16, so that theresistanceto its progress through the water is reduced to a minimum, andits speed is increased.

The invention is shown applied to a boat having its hull provided with asingle step, but on boats having more than one step, a correspondingnumber of rollers 15 will be used.

I claim:

1. The combination with the hull of a hydro-plane; of anti-frictionrollers positioned transversely and amidships of the hull, andprotruding from the bottom thereof, and an anti-friction rollerpositioned transversely astern of the hull.

2. The combination with the hull of a hydro-plane; of verticallyadjustable antifriction rollers positioned transversely and amidships ofthe hull, and protruding from the bottom thereof.

3. The combination with the hull of a hydro-plane having a steppedbottom; of anti-friction rollers positioned transversely of the hullbehind the step and vertically adjustable.

4. The combination with the hull of a' the hull.

In testimony whereof I affix my signature.

ARTHUR C. ZIEBELL.

